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6. When does nuclear fission occur?

  • When a nucleus explodes into a million little pieces
  • When a nucleus (e.g.uranium) absorbs a neutron and this causes the nucleus to split
  • When a stable atom splits into two or more that are unstable
  • When a nucleus splits into electrons

7. What else is released during a fission reaction?

  • electricity
  • all of the above
  • Kinetic energy
  • Sound waves

8. What's the relative charge of an alpha particle?

  • +2
  • -3
  • +4
  • 4,2

9. How is a gas' particles described?

  • particles spread out moving randomly
  • particles flowing side-to-side
  • particles tightly packed
  • particles bouncing in the air

10. How is the rate of gas pressure measured?

  • How quickly gas fills up the container and the amount of particles filling up the container
  • How quickly each gas particle collides into another
  • The frequency of gas particles hitting their containers walls and the speed they do it at
  • The smell of the gas

11. What is the plum pudding model's description?

  • A ball of protons
  • A ball of neutral charge
  • A sphere of positive charge
  • A circle with electrons everywhere

12. What happens when the nucleus splits?

  • It's electrons start vibrating rapidly
  • It creates two smaller nuclei roughly equal in size called the daughter nuclei
  • It explodes
  • It creates three nuclei called son nuclei

13. Are changes in state reversible?

  • Yes
  • No

14. How is a liquid's particles described?

  • particles that can slide past each other
  • particles tightly packed but free to move past each other
  • particles packed tightly in a regular structure
  • particles bouncing up and down

15. How is a solid's particles described?

  • huh
  • particles moving freely
  • particles packed tightly in a regular structure
  • particles tightly packed but free to move past each other

16. What is resistance affected by?

  • Length of wire, Temperature, Amount of resistors
  • Length of bulb
  • Amount of power packs

17. What is the formula for density?

  • Density = Mass/Volume
  • Density = Mass x Volume
  • Density = Volume/Time
  • Volume = Mass x Speed

18. What is a chain reaction?

  • 2 or 3 neutrons exploding out of a fission reaction and colliding with other uranium nuclei to cause further reactions
  • Chains
  • 2 or 3 neutrons exploding out of a fission reaction and colliding with other hydrogen nuclei to cause further reactions

19. What is an alpha particle made of?

  • 2 protons, 2 neutrons
  • 2 electrons, 2 protons
  • 1 proton, 1 electron
  • 1 electron, 3 protons